The 70s would not have needed to be built if the trains they mainly haul,bulk coal MGRs, wasnt lost by EWS to Freightliner Heavy Haul over the past 10 years. If more of Freightliners Heavy Haul work was in the hands of EWS(DB Schenker) then 60s would be used and so the 70s would not be required. For the container trains they haul,wouldnt a new and far more powerful electric loco design been a more environmentally freindly option than these type 5 diesels?